﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Routing;
using System.Web.Security;
using System.Web.SessionState;
using ExaminationSys.Helper;

namespace ExaminationSys
{
    public class Global : System.Web.HttpApplication
    {

        void Application_Start(object sender, EventArgs e)
        {
            // 在应用程序启动时运行的代码
            RegisterRoutes(RouteTable.Routes);
        }

        void Application_End(object sender, EventArgs e)
        {
            //  在应用程序关闭时运行的代码

        }

        void Application_Error(object sender, EventArgs e)
        {
            // 在出现未处理的错误时运行的代码
            // At this point we have information about the error
            HttpContext ctx = HttpContext.Current;

            Exception exception = ctx.Server.GetLastError();

            string errorInfo =
               "<br>Offending URL: " + ctx.Request.Url.ToString() +
               "<br>Source: " + exception.Source +
               "<br>Message: " + exception.Message +
               "<br>Stack trace: " + exception.StackTrace;

            ctx.Response.Write(errorInfo);

            // --------------------------------------------------
            // To let the page finish running we clear the error
            // --------------------------------------------------
            ctx.Server.ClearError();
        }

        void Session_Start(object sender, EventArgs e)
        {
            // 在新会话启动时运行的代码
            Session["StudentInfo"] = null;

            Session["TeacherInfo"] = null;

        }

        void Session_End(object sender, EventArgs e)
        {
            // 在会话结束时运行的代码。 
            // 注意: 只有在 Web.config 文件中的 sessionstate 模式设置为
            // InProc 时，才会引发 Session_End 事件。如果会话模式设置为 StateServer 
            // 或 SQLServer，则不会引发该事件。
            FormsAuthenticationHelper.RemoveTeacherCookie();

        }

        public static void RegisterRoutes(RouteCollection routes)
        {
            routes.Ignore("{resource}.axd/{*pathInfo}");

            routes.Ignore("{exclude}/{extnet}/ext.axd");
        }

        protected void Application_AuthenticateRequest(object sender, EventArgs e)
        {
            string url = HttpContext.Current.Request.RawUrl.ToLower();
            if (url.Contains("ext.axd"))
            {
                HttpContext.Current.SkipAuthorization = true;
            }
            else if (url.Contains("returnurl=/default.aspx") || url.Contains("returnurl=%2fdefault.aspx"))
            {
                Response.Redirect(url.Replace("returnurl=/default.aspx", "r=/").Replace("returnurl=%2fdefault.aspx", "r=/"));
            }

        }

    }
}
